Abrading machine



OctTif} 1324.

B. W. KLEIN ABRADING MACHINE Filed Jan. 5, 1924 INVENTOR a? W 7%,

ATTORNE? Patented Oct. 21, 1924.

UNITED STATES BENJAMIN W. KLEIN, OF NEW YORK, N. Y.

ABRADING MACHINE.

Application filed January 5, 1924. Serial No. 684,562.

The resent invention relates to im orovements in abrading machines, suchas are used in finishing the edges of shoe soles and heels.

In machines of this type the abrading wheels or cylinders are usuallydisposed within housings, means being provided for collecting looseparticles of the grinder or work thrown off during the abradingoperation, the last-mentioned means usually consisting of a suction fan,delivering the loose particles into a container. In practice it has beenfound that some of the particles thrown off during the abradingoperation adhere to the bottom of the housing, and, notwithstanding thefact that the said bottom is slanting, the suction fan does not removethe same, so that they are apt to leave the housing through the open endthereof, thereby endangering the health of the attendant and otherpersons in the room.

I have heretofore proposed to provide an attachment for abradingmachines, which prevents adhesion of the loose particles of the grinderand work thrown off during the abrading operation to the housing, saidattachment comprising a scraping means, in the form of rotary fanblades, within said housing, said fan blades scraping the looseparticles off the bottom of the housing, so that the fan is adapted tomove or deliver the same into the container connected to the housing,the said attachment being described in application for U. S. LettersPatent, Ser. No. 646,388, filed by me on June 19, 1923. In practice ithas been found that, inasmuch as these fan blades are made of metal andcannot be covered by protecting means, they are apt to injure the handsof the operator in handling the work.

The main object of the present invention is to overcome this diflicultyby providing a flexible means, which not only cleans the bottom of thehousing but also the abrading wheel.

With these and other objects in View, which will more fully appear asthe nature of the invention is better understood, the same consists inthe combination, arrangement and construction ofparts hereinafterdescribed, pointed out in the appended claims and illustrated in theaccompanying drawings, it being understood that many changes may be madein the size and proportion of the several parts and details ofconstruction within the scope of the appended claims, without departingfrom the spirit or sacrificing any of the advantages of the invention.

One of the many possible embodiments o l the invention is illustrated inthe accompanying drawings, in which Figure 1 is a front elevation of aportion of an abrading machine constructed in accordance with thepresent invention; Fig. 2 is a vertical section taken through one of theabrading wheels, its housing and the attachment constructed inaccordance with the present invention, on a larger scale; and Fig. 3 isa section taken on line 3-3 of Fig. 2.

Referring now to the drawings, the nu meral 10 indicates one of thetransverse frame members of an abrading machine, provided with a bearing11, in the latter being rotatably mounted av longitudinally extendingshaft 12. This shaft may be driven in any suitable manner from anysuitable source of power, for instance by the intermediary of a belt,not shown, running over a pulley 13 on the said shaft. To the shaft isattached a plurality of abrading wheels or cylinders 14, each of thesame being disposed within a housing 15, the front of which is open, asclearly shown in Figs. 1 and 3 of the drawings. These housings are eachprovided with a slanting bottom 16 and communi ate with a tube 17. Inthis tube is inserted a housing 18, within which is disposed an exhaustfan, not shown, said fan collecting the loose particles of the grinderor work thrown off during the abrading operation into the housing 15 andforcing or delivering th same into a receptacle 18', shown in Fig. 1 ofthe drawings. Thus far the construction and operation of the elementsare well known, so that a further detailed description thereof seems tobe unnecessary.

In each of the housings 15 is rotatably journaled a shaft 19, the samebeing journaled in bearings 20 upon th sides of the respective housing15 and extending in parallel relation to the shaft 12 a substantialdistance below the same. To the shaft 19 are secured thread-tufts 21throughout a length which corresponds to the width of the respectivehousing 15. Each tuft is of a length which is greater than th distancebetween the shaft 19 and the inner face of the bottom of the housing 15,and also greater than the distance between the shaft 19 and theperipheral portion of the respective abrading wheel or cylinder 14, sothat, in the rotation of the shaft 19, the said tufts are adapted tobrush the loose particles from the housing bottom throughout the entirewidth of the latter and also from the a brading wheel in the respectivehous- The shafts 19 may be driven in any suitable mannen for instanceeach of the sam have mounted thereon a pulley 22. ()ver these pulleysrun belts 23, which run also over the main driving shaft 24: of themachine. The diameter of the pulleys 22 may be smaller than that of themain driving shaft, so that the shafts 19 may be rotated at aconsiderable speed.

The tufts 2-]. may be secured to the shafts 19' in any suitable manner,for instance a bunch of threads 'may be folded back upon itself at itsmiddle portion to form a bight. The bight portion of the hunch is thenbent around the shaft 19 and the ends of the bunch extended through thebight and drawn taut on the shaft 19. In order to causethe tuft toadhere properly to the shaft 19, so as to rotate therewith, the bightportion of the thread bunch may be treated. with shoe-ma-kers wax orsimilar material, sufficient to cause adhesion thereof to the shaft. Inthe rotation of the shafts 19, the thread-tufts remove the looseparticles from the bottom of the housing and also from the abradingwheels, the said loose particles being then delivered into the receptacle 18.

It is obvious that, since the thread-tufts are flexible, they do notinjure the hands of the operator;

It is to be noted that, while herein specific tufts have been describedand a specific manner of attaching the same to the shafts 19 has beendisclosed, any other material may be used and any other suitable way ofattaching the tufts to the shaft may be resorted to without departingfrom th invention.

What I claim is 1- 1. An abrading machine including av rotary shaft, anabrading wheel thereon, a. housing partly enclosing said wheel havingits bottonr disposed at a suliistantial distance below said wheel, aircurrent producing means connected with said housing acting constantly onsaid abrading wheel. a second rotary shaft journaled in said housingbelow said first-mentioned shaft. and flexible means on saidseeond-mentioned shaft fo removing from the inner face of said housingparticles of the grinder or work thrown off during the abradingoperation.

2. An ahrading machine accordin to claim 1. said flexible means servingalso to clean said abrading wheel.

Signed at New York, in the county of New York and State of New York,this 28th day of December, A. D. 1923.

BENJA HN lV. KLEIN.

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